Relay.



A. WALLACE.

RELAY.

APPLICATlON FILED MAY 4. I916- Patnted Nov. 19, 1918 I XVgTOR 4 c 76 isrigidly 1 s rhannrr @FFEQE.

A. WALLACE, F PITTSBURGH, TPEENSYLVAHL'A, ASSIGNOR TO THE UNIUR @WIIE'GH& SIGNAL COMPANY, @F SWISSVALE, PENNSYLVAIG'IA, A. CDEIEORATIG'N OFresins-revelers.

RELAY.

mes es.

Specification of Bet rs Patent.

Patented Nor. t9, r9118.

original application filed June 23, 1914, Serial No. 8457M). Divided andthis application filed May 4, 1916. Serial No. 95,303.

To all whom it may concern:

Be it known that'l, HERBERT A. WALLACE, a citizen of the United States,residing at Pittsburgh, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements inRelays, of which. the following is a specification.

My invention relates to relays.

The present application is a division or my co-pending application,Serial No. 8%,?30, filed June23, 1914, for railway signaling.

twill describe one form of relay embodying my invention, and Will thenpoint out the novel features thereof in claim.

The accompanying drawing is a view showing one form of relay embodyingmy invention Referring first to the drawing, the relay here showncomprises a top plate 19, and a base 20, "which parts are separated by aglass cylinder 81, the three parts being held together by screws 77.Mounted on the top piste 19 is a magnet, 51, having pole-pieces 79 78shaped substantially as shown. This rnagnet, may be of any suitabletype; as here shown it, is a permanent magnet. Pivotally mounted betweenthe pole-pieces, is an arr-nature 52 having a Winding 7 8. An fastenedto the armature, pivotally connected to this arm is downwardly extendinglink 53, which in turn is pivotaily connected with a rocker arm or whichis pivotally mounted at 55 in a lug 75. Pivotally mounted also-on thislug at points 56 and 57 are two arms 58 and 59, which arms carrycounterweights 60 and 61 and contact fingers 62, 63, 6d and 65.

As here shown, the fingers 65 and 63 are adapted to engage with contacts68 and 69 respectively, which in turn are supported by studs 82 and 7mounted in the top plate 19. Fingers 62 and (it which are carried byarms 58 and 59, are adapted to make contact with blocks 71 and 72respectively, which blocks are also mounted in the top plate 19.-Contact arms 58 and 59 are electrically connected with posts 83 and Mrespectively by wires 73 and 74: which posts are also mounted in topplate 19.

The downward movement of: arms 59 and 58 is, as here shown, limited bystops 66 and 67 respectively, but since the contact fingers 65 and 63rest on contacts 68 and 69 when the arins are down, these contacts maybe employed as stops if desired, in which case stops 68 and 67 may beomitted.

It is understood that. the arms 59 and 58 and the contacts operatedthereby may be duplicated, all of the arms extending to the i tactfingers 63 and 65 engage with contacts 69 and 68 respectively.

When Winding 7 8 is supplied with current of such polarity as to causearmature 52 to rotate in the direction of arrow 89, 70, which is rigidlyfixed to the armature 53 to move upwardly, thus causing arm to rotate insuch direction as to raise arm e thus bringing contact finger 52 intoengagement with bloclr '5' raising finger 63 out of engagement with'ontact 69.

When the polarity of the current in winding 78 is reversed, armature 52will rotate in the direction of arrow 80, thereby rnovi U link 53downwardly. Arm 5% then rotates about point 55, has been previouslyplained, hut

the opposite direction, thus raising arm 59 so that finger tidengagesblock 72 and finger 65 leaves contact 88.

it will be seen that When the relay is deenerglzed both fingers 58 and59 rest on their steps so that Tooth back contacts are made; but whenthe 1 lay is energized one or the other of the ,gers is raised accordingto the polarity of the current in the armature. This operation of thecontacts may be utilined for the control of railway signal cir cuits inthe manner described in the parent application above referred to, or inany other manner as readily understood by those skilled in the art.

Although I have herein shown and described only one form of relayembodying my invention, it is understood that various changes andmodifications may be made said fingers in opposition to-its bias toengage its front contact when the member moves in one direction from itsmiddle position, and for moving the other finger in opposition to itsbias to engage its front contact when the member moves in the otherdirection from its middle position.

In testimony whereof I afiix my signature in presence of two Witnesses.

HERBERT A. WVALLACE.

Witnesses:

HERMAN vTEGKER, H. Loorrrs.

